module.2.session.1.handouts

module.2.session.1.handouts - Module 2 Data Management...

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9/13/2009 1 Module 2: Data Management Session 1: Database Capabilities & Concepts: Part 1 Dr. Russ Robbins Describe what a [relational] database is… Explain how a database can be helpful to an organization Know when to use a database versus a spreadsheet Have some ideas about how data is accessed from a database using a particular technique known as SQL Know which three database vendors own 90% of the DBMS market. We will discuss importance of data and what you should think about when using and managing data I will demonstrate similar activities using a database & a spreadsheet to show you, how in some cases, databases are the better tool. We will discuss characteristics of relational (the most common) databases. We will see an example of a portion of a relational database. We will compare spreadsheets and databases again. We will quickly review the database marketplace.
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9/13/2009 2 What are some examples of valuable or important data? What do you think is a company’s most important asset? Why? In your future (or current) career in what ways do you think you will be using data? How important a role will data play in what d d d ? you do day-to-day? What are the challenges and issues associated with: Collecting – “Where does it come from?” Storing – “Where is it kept” Using data – “How is it accessed?”
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9/13/2009 3 1. Good for large quantities of data 2. Good for shared access 3. Good for repeated access in same way 4. Good for many, many 1. Good for lists 2. Good for small amounts of data 3. Good for personal data used especially just for your job Database Spreadsheet different types of requests. 5. Good for capturing data 6. Good for 3, 4, 5 in 2 nd column just for your job. 4. Good for filtering 5. Good for sorting 6. Good for summing, averaging, etc. The following database: intl_sales.mdb contains international sales information. It is stored in two “related” tables: ORDER and COUNTRY A Sales Manager wants to “query” (i.e., ask) the database about the following: 1. Total Orders by Product.
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